QBMB is a file extension associated with a package of financial and accounting software for companies called QuickBooks. QBMB files are used to store backups of a company's financial data. It is a solution to protect the company against unexpected data loss from the original program files. Restoring such data from a backup is as simple as changing the extension from QMBM to the one that had the original data file and copying it to the appropriate location.

QuickBooks is Intuit's software developed for Microsoft Windows and macOS.